Carbon-brush holder.



J. H. KNIGHT.

CARBON BRUSH HOLDER.

APPLICATION FILED mm. s, 19H.

Patented May 28, 1918.

c/TZZ ELY/97017 WWI/lg Mlgmk.

JAMES H. KNIGHT, OF FORT WORTH, TEXAS.

CARBON-BRUSH HOLDER.

Specification of Letters Patent.

Application filed March 6, 1917. Serial No. 152,747.

To all whom it may concern:

Be it knownthat I, JAMES H. KNIGHT, a citizen of the United States,residing at Forth Worth, inthe county of Tarrant and State of Texas,have invented certain useful Improvements in Carbon-Brush Holders, ofwhich the following is a specification, reference being had therein tothe accompanying drawing. I

The present invention has reference generally to improvements in brushholders and more particularly relates to carbon brush holders especiallyadapted for use on motors, dynamos, commutators, etc., for the purposeof conducting electric current.

It is the principal object of the present invention to provide novelmeans for holding a carbon brush and to associate with the holding meansnovel resilient means for automatically adjusting the carbon brush toconsequently hold the brush in yielding contact, thus insuring aneflicient transmission of electric current.

As an additional and equally important object this inventioncontemplates the provision of integrally formed attaching means andbrush receiving means.

Among the other aims and objects of the present invention may be recitedthe provisions of a device of the character mentioned with a view tocompactness, in which the number of parts are few, the constructionsimple, the cost of production low, and the eificiency high.

Other objects as well as the nature, characteristic features and scopeof my invention will be more readily apparent from the followingdescription taken in connection with the accompanying drawings andpointed out in the claims forming a part of this specification.

The preferred embodiment of the present invention is clearly illustratedin the accompanying drawings in which z- Figure 1 is a perspective ofthe invention.

Fig. 2 is a ongitudinal section of the attaching sleeve and receivingsocket, the other parts being shown in elevation, and

Fig. 3 is an end elevation looking toward the end of the sleeve, thesupporting shaft being shown in sections.

Similar characters of reference are employed in all of the abovedescribed views, to indicate corresponding parts.

Referrin now, more particularly, to the accompanying drawings I haveassociated while the inner bore thereof communicates with the inner boreof the sleeve.

- The socket projects at right angles from the longitudinal axis of thesleeve and slidably receives a carbon brush 6, the latter beingsupported and guided by the socket.

In order to automatically adjust the carbon brush and normally maintainit in an efficient yielding contact with the commutator or motor 7 Ihave provided my improved resilient means in the present instanceconsisting of a coil spring 8 disposed in the socket and having therespective ends bearing against the shaft 1 and the inner end of thebrush 6. In use, it will be readily apparent that the tension of thespring serves to maintain the outer or engaging end of the carbon brush6 in contact with the motor or commutator and thus serves to insure aneffective transmission of electric current. The two parts composing theentire device can be readily mounted in an operative position and theconstruction is such that should any of the parts become broken ordamaged it can be readily replaced without affecting the operation.

It will be understood that the above description and accompanyingdrawings comprehend only the general and preferred embodiment of myinvention and that various minor changes in detail of construction,proportion and arrangement of the parts -may be made within the scope ofthe appended claims and without sacrificing any of the advantages of myinvention.

Havin thus fully described my invention, what I c aim as new and desireto secure by Letters Patent, is

1. In a device of the class described a combination, a shaft, a supportfor said Patented May 2a, 1918.

from said shaft, a sleeve adapted to slide upon said shaft, said sleevebeing formed with longitudinal diametrically opposed recesses in whichthe projecting ends of said pins are adapted to project so as to berocked against and rotated upon said shaft, said sleeve being formedwith anintegral retiring tubular portion, spaced from said commutator acentrifugal brush engaging said commutator and projecting into thetubular portion of said sleeve and a spring mounted within said tubularportion and having one end dproject against said shaft and another enprojecting against said brush so as to apply tension against said 15.brush.

2. In a device of the class described a combination of a shaft,- asupport for said shaft, a sleeve slidable upon said shaft, a

pin passing through said shaft and having 20 its opposite end projectingradially therefrom, such sleeve being rovided with recesses extendinglongitudinally thereof, the

projectin ends of the said pin adapted to enter sai recess of saidsleeve; and a brush 25 carrying arm formed upon said sleeve. Intestimony whereof I afiix my signature.

JAMES H. KNIGHT;

